423459431 has 2 divisors, whose sum is σ = 423459432. Its totient is φ = 423459430.

The previous prime is 423459401. The next prime is 423459481. The reversal of 423459431 is 134954324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423459431 is a prime.

It is a super-2 number, since 2×423459431² = 358635779405687522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423459391 and 423459400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423459401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211729715 + 211729716.

It is an arithmetic number, because the mean of its divisors is an integer number (211729716).

Almost surely, 2^423459431 is an apocalyptic number.

423459431 is a deficient number, since it is larger than the sum of its proper divisors (1).

423459431 is an equidigital number, since it uses as much as digits as its factorization.

423459431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 35.

The square root of 423459431 is about 20578.1299198931. The cubic root of 423459431 is about 750.9377490876.

The spelling of 423459431 in words is "four hundred twenty-three million, four hundred fifty-nine thousand, four hundred thirty-one".